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| eco-technique | |||
| ecotechnics (ecotechnica) | |||
| ecological technique | |||
| ecotechnology; environmentally sound technology | |||
| ecologic technique | |||
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生态 技 术 : 11 phrases in 4 subjects |
| Ecology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 7 |
| Water resources | 1 |
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